topBotCoding: Top and Bottom Coding
In sdcTools/sdcMicro: Statistical Disclosure Control Methods for Anonymization of Data and Risk Estimation

topBotCoding

R Documentation

Top and Bottom Coding

Description

Function for Top and Bottom Coding.

Usage

topBotCoding(obj, value, replacement, kind = "top", column = NULL)

Arguments

`obj`	a numeric vector, a `data.frame` or a `sdcMicroObj-class`-object
`value`	limit, from where it should be top- or bottom-coded
`replacement`	replacement value.
`kind`	top or bottom
`column`	variable name in case the input is a `data.frame` or an object of class `sdcMicroObj-class`.

Details

Extreme values larger or lower than value are replaced by a different value (replacement in order to reduce the disclosure risk.

Value

Top or bottom coded data or modified sdcMicroObj-class.

Note

top-/bottom coding of factors is no longer possible as of sdcMicro >=4.7.0

Author(s)

Matthias Templ and Bernhard Meindl

References

Templ, M. and Kowarik, A. and Meindl, B. Statistical Disclosure Control for Micro-Data Using the R Package sdcMicro. Journal of Statistical Software, 67 (4), 1–36, 2015. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.18637/jss.v067.i04")}

Examples

data(free1)
res <- topBotCoding(free1[,"DEBTS"], value=9000, replacement=9100, kind="top")
max(res)

data(testdata)
range(testdata$age)
testdata <- topBotCoding(testdata, value=80, replacement=81, kind="top", column="age")
range(testdata$age)

## for objects of class sdcMicro:
data(testdata2)
sdc <- createSdcObj(testdata2, keyVars=c('urbrur','roof','walls','water','electcon','relat','sex'),
           numVars=c('expend','income','savings'), w='sampling_weight')
sdc <- topBotCoding(sdc, value=500000, replacement=1000, column="income")
testdataout <- extractManipData(sdc)

sdcTools/sdcMicro documentation built on March 15, 2024, 12:32 p.m.